I want to construct a formula so that when one enters a date, then a certain respective number appears in reaction to date occurring within a certain temporal range.
Temporal Ranges include all dates respectively mentioned
02/01/2011 - 01/31/2012
Year to return: 2010
02/01/2012 - 01/31/2013
Year to return: 2011
02/01/2013 - 01/31/2014
Year to return: 2012
02/01/2014 - 01/31/2015
Year to return: 2013
02/01/2015 - 01/31/2016
Year to return: 2014
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